Re: sensitivity analysis

[Michaël Kummert <kummert@xxxxxxxxxxxxx>]

Jeroen,

> I'm doing sensitivity analysises in the same way as Hilde (with Matlab), 
> if you want an example of the matlab-file, I can send it to you, Beatriz.
> But I also ran into a problem:
> I want to use my data-files from type 25 as an input in my next run of 
> trnsys, but there is always a header line in the type25-files.  This 
> data file is 8760 houres, i.e. one year long. I don't have any problems 
> when my simulation is one year aswell; I just let the data reader skip 
> the first line. But when I want to run more years in a row, the data 
> reader doesn't skip the first row anymore and an error is produced.
> Does somebody know how I can get rid of the header line in trnsys ? or 
> how to skip the header line when the second year is started ?

I assume you are using a sub-hourly time step. The problems with header 
lines are due to a bug (several bugs) in Type 9. Usually it is possible 
to find a start time that works but it can be hard, I have to admit. 
Those problems will be fixed in TRNSYS 16.

There IS a way to get rid of the file header in TRNSYS 15 with one of 
the settings in CNFGTR.TRN. You can place a copy of that file in the 
directory where your deck file is, and change line 4 to display:

N        -> WRITE PRINTER LABELS TO THEOUTPUT FILE?    [Y OR N]

That way the labels will not be displayed. Simulations in other 
directories will not use that copy of CNFGTR.TRN so you should be OK.

> And something else, does somebody know how to put TRNSYS the whole in 
> time in low priority, i.e. before it starts running ? Everytime it 
> restarts for the analysis, I have to open the task manager and do it again.

Richard gave a solution to that problem :-)

As I mentioned in a previous email, wrapping TRNSYS calls in "start" 
calls can also be used to terminate TRNSYS in case a simulation hangs 
(possibly because errors have been found):
http://sel.me.wisc.edu/trnsys/mailinglist/archive2003/msg00518.html


Kind regards,

Michaël Kummert

--
_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert@xxxxxxxxxxxxx

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